/newsroom/taxonomy/term/2646/all en /newsroom/channels/news/mining-ancient-ores-clues-early-life-219461 <p>An analysis of sulfide ore deposits from one of the world’s richest base-metal mines confirms that oxygen levels were extremely low on Earth 2.7 billion years ago, but also shows that microbes were actively feeding on sulfate in the ocean and influencing seawater chemistry during that geological time period.</p> Mon, 10 Dec 2012 17:48:22 +0000 christopher.chipello@mcgill.ca 12313 at /newsroom /newsroom/channels/news/aerosol-emissions-east-asia-driven-consumption-developed-countries-262510 <p>Much of the influence on climate from air pollution in East Asia is driven by consumption in the developed countries of Western Europe and North America, according to research co-led by À¦°óSMÉçÇø atmospheric scientist Yi Huang.</p> <p><span>In a paper published online this week in <em>Nature Geoscience,</em> Huang and colleagues from China, the U.S. and U.K. report that international trade shifts the climate impacts of aerosols -- solid or liquid particles suspended in air -- from net consuming countries to net producing countries.</span></p> Tue, 06 Sep 2016 19:44:07 +0000 christopher.chipello@mcgill.ca 26126 at /newsroom